Folding camp chair



FJM. STOLL.

FOLDING CAMP CHAIR.

APPLICATION FILED JULY I, 1921.

1 ,422,3 1 9, Patented July 11, 1922.

2 SHEETS-SHEET I.

INVENTOR.

F M. STOLL.

FOLDING CAMP CHAIR.

APPLICATION FILED JULY 1. 1921.

1,422,233 1 9, Patented July 11, 1922.

2 SHEETS-SHEET 2.

IN VEN TOR.

ATTORNE FRANK ivr. s'rOLL, or DENVER, COLORADO.

Specification of Letters Patent.

FOLDING CALIF CHAIR.

Patented July 11, 1922.

Application ere-d July 1, 1921. Serial No. 481,827.

To all whom it may concern:

Be it known that I, F RANK M. STOLL, a

' citizenoi' the United States, and ares'ident of Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Folding Camp Chairs; and I do declare the followingto be a fulL-clear, and exact description of the-same,suclras will enable others skilled in thelart to whichit appertains to make and use my invention, reference being had to the accompanying drawings, and to the refer- I once numeralsmarkedthereon, which :form

part ofthis specification. My invention, relates to back rests for chairs of the folding 133 136111101?! particularly usedior: camping purposes.

Theyprinci'pal object of myinvention is to provide a back-rest of substantial construction for, folding camp chairs of'the type described in-U. S. Letters Patent Number 1,157,795, patented October 26th, 1915, to PhillipJjMix.

' Anotherobjectbfmyinvention is tozprovide a back-rest that while substantial will be resilient and yielding, thereby affording the maximum of comfort to the user.

A further object of'my invention is to provide a back-rcstthatmay' be readily folded with the chair'properand occupyaminimum of space.

i In the-use of "my invention, many other objects and advantages embodied in, the'ooin struction tllGIGOiEWlll readily appear, and 1 wishitunderstood that all such objects and advantages are anticipated and within the scope of myinvention.

nIHwillnow proceed to describedny inven tion with reference to the accompanying drawings which form a part hereof. Like ,numeralsrefento like-parts throughout the specification and in all views of the drawings.

In the drawings; p

Figure 1, is a perspective view of a chair -Ofitl16 type described, having my improved backs-rest extended for use.

Figzj 2, is a" perspective view of the chair and back restfolded ready for carrying Fig. 3, is a fragmentary detail view, show- ;ing themannerinwhich my improved backrest is attached to the chair proper.

line .8 8, Fig. 7.

Letthe numeral 10, designate the chair proper which is described in vdetailin U.. S.

Letters Patent N umber 1,157 ,795, issued'()ctober 26, *1915'to Phillip J. Mix, chair 10, consists of four'legs,each designated by the numeral 11. Said legs are arranged, .When extended, in pyramidal form and are all zplvoted at their upper extremities to. a block 12. Intersecting said legs 11 and pivoted theretoare four seat supports 13, arranged,

when extended, in'the form of an inverted pyramid, being pivoted at theirlower extremities to a common block l h which is arranged directlybelow the-block 12, and is connected therewith by means of a bolt 15, provided with a'wing nut :16.

The seat ofthe chair 10 is designated by the numeral 17, and is ofvsquare shape and composed of leather, canvas-or similar 'flexl- =b1e material. Hooks 18 are riveted or otherwise fastened-to each corner of the seat 17 and are adapted to engage in-the'upper extrem'ities of seat supports 13. \Vhen wing nut '16 is revolved, theblocks 12 and 14; are

drawn towards one another, thereby causing the upper extremities of the four seat supports to move "outwardly thus increasing the tension in' the seat 17 and keeping lttaut.

The abovedescription will sutficetoidentii'ty a type of chair to which my improved back-rest may be applied.

Let the' numeral '20 designate my improved back-rest in its entirety, consisting of two upright members 21 and 22, which are formed of channels, U shape in cross section, which are connected near theirupper extremities by-strips' 23. The strips 23 are'iormed of two parts ofequallength, the parts being pivoted together at their inner 6O upper-ends of theslots 30 as shown at 36,

end of the' two rear extremities as shown at 24, and to the upright members 21 and 22 at their outer extremities. When the back-rest 20 is folded, strips 23 overlap each other as shown in Fig. 6.

Back-rest 20 is supported upon chair 10 by means of two back-rest supports 24 and 25, each of which consists of an upper member 26 formed of U shaped channel ma: terial and a lower member 27, formed of a solid rectangular bar. nates at its lower extremity in a curved neck 28 which passes through an opening 29 in one of the legs 11. The neck 28 has an enlarged portion on the end thereof which prevents its withdrawal from the opening 29 after said opening has been closed around it. I have found that this form of pivot'ismore satisfactory and more easily manufactured than the usual-pin pivot. -Near the upper extremity of member 27 a slot 30is formed in which a pin 31, fixed in the lower extremity of member26, is arranged to travel. Back-rest supports 24 and 25 are supported near their upper extremities by means of rectangular yokes or collars 32, which are hinged'near the outer I supports 13 by means of hinges 33.

When extended for use members 26 and 27 of theback-rest supports 24 and 25 are in alignment, the pins 31 being in the lower ends of the slots 30, beingrigidly held from i any pivotal action by the U shaped members 26. Upright members 21 and 22 are slipped over the protruding upper extremities of the members 26. Ears 34 formed on members 21' and 22 extend within the collar 32, which supports the back-rest supports, and wedge the joint rigid. Shoulders 35 formed on members 21 and 22, rest upon" the collar 32, thereby preventing members 21 and 22 from sliding further over members 26. In the lower portions of members 21 and 22 and in the upper portions of members 26 the open side of the 'U bar has been closed as shown in Fig. 4, forming hollow tubes.

When the weight of the person using the chair is brought against the back-rest, the spring steel strips 23 bow outward conformmg to the contour of the persons back.

This bonding is resisted by the elasticity of the chair itself as well as by the elasticity in the strips 23, thereby giving a resiliency to the back-rest that adds to the comfort of the user.

In folding the chair, the back-rest 20 is removed from the b'aclerest supports 24 and 25 and'folded as shown in Fig. 6; members 26 are raised until the pins 31 occupy the 37 and shown in broken lines in Fig. 5,

Member 27 termiuntil it lies within the U shaped leg 11 and seat support 13 as shown by the full line position in Fig. 5.

Collar 32 is then folded baclr as indicated by arrow 38, the upper 17 and tied-by means of tapes 40, carried by the seat 17, as shown in Fig. 2. This forms a neat and compact storage.- a

Since the legs 11 andsupports 13 extend from the center outward towards the corners of the seat, yokes 32 and" back-rest supports24 and 25 also set atthis angle. Upright members 21 and 22 are set'on'strips 23 at an angle to make it necessary to twist them, bowing the strips 23 outward from bundle for carrying-or elasticity of strips23, causing members-21 and 22 to clamp to members25 and 26 until they are again twisted to remove them.

I claim and desire to -secure by Letters Patent is: V Y i 1. The combination with a chair of th class described of a back-rest consisting of two upright members flexibly joined together by resilient means, adapted to be detached from said chair and co'llapsed, foldable supports for supporting said back-rest on saidchair, said foldable supports being adapted to fold within and simultaneously with said chair. i

2. The combination with a folding camp chair ofa back-rest formed of two upright members detachably connected with said chair, pivoted -means connecting said upright members and forming the back-rest proper, said upright-members arranged to fold against and parallel with each other, supports for said back-rest v consisting of members pivotedto the legs of said chair at their lower extremities and to backrest supporting members at their-upper extremities, said back-rest supporting members being adapted to fit, at th'eirlupper extremities, into said upright supports, means-for locking said pivoted members to said backrest supportingmembers when extended, means for detachably connecting said. backrest supporting members to the seat supports of said chair.

the chair, in order to fit them overmembers 25 and 26. This twist is resisted by the Having thus described my invention what 3. The combination. of a; folding chair I having back-rest supports arranged thereon, said clamping action serving to lock said a back-rest having two upright members arback-rest to said chair. 10 ranged t0 fit over said back-rest supports, In testimony whereof I affix my signaelastic strips connecting said upright Inemture in the presence of tWo Witnesses.

bers and tending to hold same at an angle FRANK M. STOLL. differing from the angle of said back-rest Witnesses:

supports, thereby causing them to exert a EVAIIYN C. MERCER,

clamping action on said back-rest supports, GERTRUDE ANDERSON. 

